EP 1165929 A1 20020102 - METHOD AND APPARATUS FOR DIRECTIONAL BORING
Title (en)
METHOD AND APPARATUS FOR DIRECTIONAL BORING
Title (de)
VORRICHTUNG UND VERFAHREN ZUM RICHTUNGSBOHREN
Title (fr)
PROCEDE ET APPAREIL DE FORAGE DIRIGE
Publication
Application
Priority
- US 0005568 W 20000303
- US 12259399 P 19990303
Abstract (en)
[origin: WO0055467A1] A drill head for an apparatus for directional boring according to the invention includes a bit, a holder for a device for detecting angular orientation of the bit, and a hammer including a striker for delivering impacts to the bit, wherein the bit assembly, holder and hammer are connected head to tail with the bit at a front end. The bit of the invention has a frontwardly facing main cutting surface having a plurality of main cutting teeth disposed thereon and a gage tower extending radially outwardly from the main cutting surface, which gage tower has at least one frontwardly facing gage gutting tooth thereon suitable for cutting over an angle defined by less than a full rotation of the bit. The device for detecting angular orientation is in a predetermined alignment with the gage tower so that it determines the orientation of the gage tower relative to the axis of rotation of the drill head.
IPC 1-7
IPC 8 full level
E21B 4/14 (2006.01); E21B 4/20 (2006.01); E21B 7/06 (2006.01); E21B 7/08 (2006.01); E21B 10/36 (2006.01); E21B 10/56 (2006.01); E21B 47/02 (2006.01)
CPC (source: EP SE US)
E21B 4/14 (2013.01 - EP SE US); E21B 4/20 (2013.01 - EP US); E21B 7/068 (2013.01 - EP SE US); E21B 10/36 (2013.01 - EP SE US); E21B 10/56 (2013.01 - EP US); E21B 47/02 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
WO 0055467 A1 20000921; AU 3719300 A 20001004; CA 2366115 A1 20000921; EP 1165929 A1 20020102; US 2002011355 A1 20020131; US 2002043406 A1 20020418; US 2003024739 A1 20030206; US 6390207 B2 20020521; US 6439319 B1 20020827; US 6454025 B1 20020924; US 6516899 B2 20030211; US 6588516 B2 20030708; US RE44427 E 20130813
DOCDB simple family (application)
US 0005568 W 20000303; AU 3719300 A 20000303; CA 2366115 A 20000303; EP 00916024 A 20000303; US 19110902 A 20020708; US 201213355308 A 20120120; US 51796700 A 20000303; US 51841900 A 20000303; US 95741101 A 20010920; US 95741201 A 20010920